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/* $OpenBSD: rthread_np.c,v 1.8 2013/03/31 22:43:53 kurt Exp $ */
/*
* Copyright (c) 2004,2005 Ted Unangst <tedu@openbsd.org>
* Copyright (c) 2005 Otto Moerbeek <otto@openbsd.org>
* All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/lock.h>
#include <sys/resource.h>
#include <sys/queue.h>
#include <errno.h>
#include <pthread.h>
#include <pthread_np.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <uvm/uvm_extern.h>
#include <machine/spinlock.h>
#include "rthread.h"
void
pthread_set_name_np(pthread_t thread, const char *name)
{
strlcpy(thread->name, name, sizeof(thread->name));
}
int
pthread_main_np(void)
{
return (!_threads_ready || pthread_self() == &_initial_thread ? 1 : 0);
}
/*
* Return stack info from the given thread. Based upon the solaris
* thr_stksegment function. Note that the returned ss_sp member is the
* *top* of the allocated stack area, unlike in sigaltstack() where
* it's the bottom. You'll have to ask Sun what they were thinking...
*
* This function taken from the uthread library, with the following
* license:
* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
int
pthread_stackseg_np(pthread_t thread, stack_t *sinfo)
{
int ret;
struct rlimit rl;
if (thread->stack) {
sinfo->ss_sp = thread->stack->sp;
sinfo->ss_size = thread->stack->len;
if (thread->stack->guardsize != 1)
sinfo->ss_size -= thread->stack->guardsize;
sinfo->ss_flags = 0;
ret = 0;
} else if (thread == &_initial_thread) {
if (getrlimit(RLIMIT_STACK, &rl) != 0)
return (EAGAIN);
/*
* round_page() stack rlim_cur and
* trunc_page() USRSTACK to be consistent with
* the way the kernel sets up the stack.
*/
sinfo->ss_size = ROUND_TO_PAGE((size_t)rl.rlim_cur);
sinfo->ss_sp = (caddr_t) (USRSTACK & ~(_thread_pagesize - 1));
sinfo->ss_flags = 0;
ret = 0;
} else
ret = EAGAIN;
return ret;
}
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